# A071304 (b-file synthesized from sequence entry)
1 1
2 4
3 120
4 14400
5 9360000
6 29016000000
7 457002000000000
8 35646156000000000000
9 13946558535000000000000000
10 27230655539587500000000000000000
11 266009466302345390625000000000000000000
12 12987912192212013697265625000000000000000000000